R

V6309

V6319

Copyright © 2006, EM Microelectronic-Marin SA

03/06 – rev.G

1

www.emmicroelectronic.com

3-Pin Microprocessor Reset Circuit

Description

The V6309 and V6319 are microprocessor supervisory

circuits used to monitor the power supplies in µP and digital

systems. They provide excellent circuit reliability and low

cost by eliminating external components and adjustments

when used with 5V powered or 3V powered circuits.

These circuits perform a single function: they assert a reset

preset threshold, keeping it asserted for at least 140ms after

between the two devices is that the V6309 has an active-low

RESET output (which is guaranteed to be in the correct

high RESET output. The reset comparator is designed to

operation with a variety of supply voltages are available.

Low supply current makes the V6309/V6319 ideal for use in

portable equipment. The V6309/V6319 come in a 3-pin

SOT23 package.

Features

!

Precision monitoring of 3V, 3.3V and 5V power supply

voltages

!

Fully specified over the temperature range of

-40 to +125°C

!

140ms minimum power-on reset pulse width:

RESET output for V6309

RESET output for V6319

!

16 µA supply current

!

!

Power supply transient immunity

!

No external components needed

!

3-pin SOT23 package

!

Fully compatible with MAX809/MAX810

Applications

!

Computer

!

Controllers

!

Intelligent instruments

!

Critical µP and µC power monitoring

!

Portable/battery-powered equipment

Typical Operating Configuration

Micro-

processor

RES

RES

V6309

Fig. 1

Pin Assignment

V6309/19

3

2

1

RES / RES

SOT23-3L

Fig. 2

Pin Description

Pin

Name

Function

1

Ground

2

for V6309

RESET

reset threshold

2

for V6319

RESET

RESET Output remains high while

reset threshold

3

VDD

Supply voltage (+5V, +3.3V or

+3.0V)

Table 1